With the switch to our new web host, we've taken the opportunity to make some improvements to our web pages. In particular, you can now add PDF downloads to your shopping cart, instead of having to make a separate transaction for each file.

This also means that when you download a PDF from us, you'll still have access to the file later, if/when it is updated.

When you update something that you previously purchased via PDF, how does it work if you update that file later to get that newer copy. Does an email go out?For example, just bought the PDF of ST:ops. If you update that with errata, how do you redownload? Just use the original email that was sent?